Question

actin molecules are globular and have binding sites to which the heads of a(n) molecule can attach. need help? review these concept resources. rate your confidence to submit your answer. high medium low reading © 2025 mcgraw hill. all rights reserved. privacy center terms of use

Explanation:

Actin is a key protein in muscle - contraction. Myosin heads bind to actin's binding sites during muscle movement.

Answer:

Myosin